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Chapter 5. SETTINGS BEFORE STARTING OPERATION
5 - 4 CT (Current Transformer) Input
The following settings are necessary when using the CT (Current Transformer) input of the optional model.
For CT input, two kinds of current values are provided.
• Current value at output ON: This value is used for the heater burnout/over-current event. The value is displayed
as CT current value.
• Current value at output OFF: This value is used for the heater short- circuit event. The value cannot be displayed.
When [CT type] is set at “heater burnout detection”, the current value at output ON becomes the CT current value
measured when the output specified in [CT output] is turned ON. The current value at output OFF becomes the CT
current value measured when the output specified in [CT output] is turned OFF.
When [CT type] is set at “current value measurement”, the current value at output ON becomes the measured CT
current value regardless of output ON/OFF status. The current value at output OFF is fixed at “0.0A”.
■ CT type setup
(1) In the operation display mode, keep the [para] key
pressed for 2 sec. or longer.
>> The unit then enters the parameter setting mode.
(2) In the parameter setting display mode, keep the [para]
key pressed for 2 sec. or longer.
>> The display is then changed to the setup setting
display.
(3) Press the [para] key several times.
>> Display the setup setting [C36:CT1 type].
(4) Press the [<], [], or []key to set the value you have
selected from the following in [C36].
0: Heater burnout detection
1: Current value measurement
>> When no keys are pressed for 2 sec. or longer, the flashing of the numeric
value is stopped to set the currently displayed value.
(5) Press the [mode] key.
>> The display is returned to the operation display.
Handling Precautions
• The display of the CT2 type is [C39].
• When the additional function of the model is that CT is not provided,
[C36] and [C39] are not displayed.
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